Backend DevelopmentPHP TutorialSimplified version of php registration and login system_php skills
Logging in to the registration system is the most common operation on the Internet every day. I have set up a category to improve the registration and login system step by step. If there are any mistakes, please forgive me.
Language used: php
Database: mysql
The functions implemented this time:
1. User registration
2. User login
Main files:
Full code
1 sql creates a user table in an existing database, with three fields: id, username, and password
2 connect.php database configuration file
<?php
$server="localhost";//主机
$db_username="";//你的数据库用户名
$db_password="";//你的数据库密码
$con = mysql_connect($server,$db_username,$db_password);//链接数据库
if(!$con){
die("can't connect".mysql_error());//如果链接失败输出错误
}
mysql_select_db('test',$con);//选择数据库（我的是test）
?>
3 signup.html registration form
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>用户注册页面</title>
</head>
<body>
<form action="signup.php" method="post">
<p>用户名:<input type="text" name="name"></p>
<p>密 码: <input type="text" name="password"></p>
<p><input type="submit" name="submit" value="注册"></p>
</form>
</body>
</html>
4 signup.php registration process
<?php
header("Content-Type: text/html; charset=utf8");
if(!isset($_POST['submit'])){
exit("错误执行");
}//判断是否有submit操作
$name=$_POST['name'];//post获取表单里的name
$password=$_POST['password'];//post获取表单里的password
include('connect.php');//链接数据库
$q="insert into user(id,username,password) values (null,'$name','$password')";//向数据库插入表单传来的值的sql
$reslut=mysql_query($q,$con);//执行sql
if (!$reslut){
die('Error: ' . mysql_error());//如果sql执行失败输出错误
}else{
echo "注册成功";//成功输出注册成功
}
mysql_close($con);//关闭数据库
?>
The registration process is completed, the following is the user login
5 login.html login form
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登陆</title>
</head>
<body>
<form name="login" action="login.php" method="post">
<p>用户名<input type=text name="name"></p>
<p>密 码<input type=password name="password"></p>
<p><input type="submit" name="submit" value="登录"></p>
</form>
</body>
</html>
6 login.php login program
<?PHP
header("Content-Type: text/html; charset=utf8");
if(!isset($_POST["submit"])){
exit("错误执行");
}//检测是否有submit操作
include('connect.php');//链接数据库
$name = $_POST['name'];//post获得用户名表单值
$passowrd = $_POST['password'];//post获得用户密码单值
if ($name && $passowrd){//如果用户名和密码都不为空
$sql = "select * from user where username = '$name' and password='$passowrd'";//检测数据库是否有对应的username和password的sql
$result = mysql_query($sql);//执行sql
$rows=mysql_num_rows($result);//返回一个数值
if($rows){//0 false 1 true
header("refresh:0;url=welcome.html");//如果成功跳转至welcome.html页面
exit;
}else{
echo "用户名或密码错误";
echo "
<script>
setTimeout(function(){window.location.href='login.html';},1000);
</script>
";//如果错误使用js 1秒后跳转到登录页面重试;
}
}else{//如果用户名或密码有空
echo "表单填写不完整";
echo "
<script>
setTimeout(function(){window.location.href='login.html';},1000);
</script>";
//如果错误使用js 1秒后跳转到登录页面重试;
}
mysql_close();//关闭数据库
?>
7 welcome.html Login successful jump page
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登陆成功</title>
</head>
<body>
欢迎光临
</body>
</html>
At this point, a simple and complete registration and login system is completed. The code is very simple and does not consider verification security and robustness. It will be improved later.
I hope this article will be helpful to everyone learning PHP programming.
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